diff options
Diffstat (limited to 'winsup/cygwin/fhandler/base.cc')
| -rw-r--r-- | winsup/cygwin/fhandler/base.cc | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/winsup/cygwin/fhandler/base.cc b/winsup/cygwin/fhandler/base.cc index b93366254..f1ad37522 100644 --- a/winsup/cygwin/fhandler/base.cc +++ b/winsup/cygwin/fhandler/base.cc @@ -896,6 +896,9 @@ fhandler_base::write (const void *ptr, size_t len) did_lseek (false); /* don't do it again */ + /* If the file system supports sparse files and the application is + writing after a long seek beyond EOF spanning more than one + sparsifiable chunk, convert the file to a sparse file. */ if (!(get_flags () & O_APPEND) && !has_attribute (FILE_ATTRIBUTE_SPARSE_FILE) && NT_SUCCESS (NtQueryInformationFile (get_output_handle (), @@ -904,12 +907,9 @@ fhandler_base::write (const void *ptr, size_t len) && NT_SUCCESS (NtQueryInformationFile (get_output_handle (), &io, &fpi, sizeof fpi, FilePositionInformation)) - && fpi.CurrentByteOffset.QuadPart - >= fsi.EndOfFile.QuadPart + (128 * 1024)) + && span_sparse_chunk (fpi.CurrentByteOffset.QuadPart, + fsi.EndOfFile.QuadPart)) { - /* If the file system supports sparse files and the application - is writing after a long seek beyond EOF, convert the file to - a sparse file. */ NTSTATUS status; status = NtFsControlFile (get_output_handle (), NULL, NULL, NULL, &io, FSCTL_SET_SPARSE, NULL, 0, NULL, 0); |